MESON Chess Problem Database

Problem Display
PID: 9377 (8/3Bb2q/3p4/2pkp3/1pR1N3/4P3/1Kb5/5Q2 w - - 0 1)

Pospisil, Josef

Besedy lidu, 1902

8/3Bb2q/3p4/2pkp3/1pR1N3/4P3/1Kb5/5Q2

#2

6 + 8

3804 Ceske Melodie 1908

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qf7#
    • 1...Qh1
      • 2.Qf7#
    • 1...Qh2
      • 2.Qf7#
    • 1...Qh4
      • 2.Qf7#
    • 1...Qf7
      • 2.Qxf7#
    • 1...Qh8
      • 2.Qf7#
    • 1...Bd1
      • 2.Qd3#
    • 1...Bb3
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Ba4
      • 2.Qd3#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Bf8
      • 2.Sf6#
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Rxc2?
      • threat
        • 2.Qd3#
        • 2.Qc4#
      • 1...Qxe4
        • 2.Qf7#
      • 1...c4
        • 2.Qxc4#
      • 1...Kxe4!
    • 1.Rxb4?
      • threat
        • 2.Sc3#
        • 2.Qc4#
      • 1...Qxe4
        • 2.Qf7#
      • 1...Bxe4
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...Bb3
        • 2.Sc3#
        • 2.Qd3#
      • 1...Bd3
        • 2.Sc3#
        • 2.Qxd3#
      • 1...cxb4!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Qc4#
      • 1...bxc3+
        • 2.Sxc3#
      • 1...Kxe4
        • 2.Qg2#
      • 1...Qxe4
        • 2.Qf7#
      • 1...Bb3
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(h);N_GUARD,XS(E)::QAB(A)
    • Q(h);N_GUARD::QAB(A)
    • Q(h);N_GUARD::QAB(A),XQ(h)
    • B(a);N_GUARD::QAR2(A)
    • B(a);N_GUARD::QAR2(A),XB(a)
    • B(g);N_GUARD::S(E),XB(g)
    • B(g);N_GUARD::S(E)
    • P(b);N_GUARD::S(E)
  • Tries
    • Try
      • R(D);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);N_GUARD,SBLOCK,XS(E)::QAB(A)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • K(d);S_FLIGHT,XS(E)
    • Try
      • R(D);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);N_GUARD,XS(E)::QAB(A)
        • B(a);XS(E)::QAB1(A)
        • P(c);::QAB1(A),XP(c)
      • Refutation
        • P(c);XR(D)
  • Actual
    • R(D);
    • Threat
      • QAB1(A)
    • Vars
      • P(b);CHECK,XR(D)::S(E),XP(b)
      • K(d);OGATEB,S_FLIGHT,XS(E)::QAB(A)
      • Q(h);N_GUARD,SBLOCK,XS(E)::QAB(A)
      • B(a);N_GUARD::QAR2(A)
      • B(a);N_GUARD::QAR2(A),XB(a)
      • P(c);::QAB1(A),XP(c)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).